'''Light bulb''' is a {{period|2}} [[oscillator]] that was found in {{year|1971}}. Its [[rotor]], known as the '''filament''',<ref name="pddict" /> is the only known 3-[[cell]] period 2 rotor, and it can be embedded in a slightly smaller [[stator]], giving the {{cells|21}}-[[cell]] variant shown below. Two other variants of this oscillator are also known.<ref>{{cite web|url=http://www.pentadecathlon.com/rotors/rotors.php?page=3 |title=Period 2 Oscillator Rotors |accessdate=March 16, 2009}}</ref> Various other small [[induction coil]]s can also be used in place of the [[snake]] at the top of the bulb, including [[house]] and [[bookend]], (the latter of which has a known {{gliders|6}} [[synthesis]] for the resulting oscillator<ref>{{citeCatagolue|title=lightbulb_and_cis-hook|page=object/xp2_03lkmzojc0cjo/b3s23|accessdate=July 16, 2019}}</ref>) though these lead to larger [[bounding box]]es.

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'''Light bulb''' is a {{period|2}} [[oscillator]] that was found in {{year|1971}}.<ref>{{CiteHickersonOscillators|accessdate=March 14, 2020}}</ref> Its [[rotor]], known as the '''filament''',<ref name="pddict" /> is the only known 3-[[cell]] period 2 rotor, and it can be embedded in a slightly smaller [[stator]], giving the {{cells|21}}-[[cell]] variant shown below. Two other variants of this oscillator are also known.<ref>{{cite web|url=http://www.pentadecathlon.com/rotors/rotors.php?page=3 |title=Period 2 Oscillator Rotors |accessdate=March 16, 2009}}</ref> Various other small [[induction coil]]s can also be used in place of the [[snake]] at the top of the bulb, including [[house]] and [[bookend]], (the latter of which has a known {{gliders|6}} [[synthesis]] for the resulting oscillator<ref>{{citeCatagolue|title=lightbulb_and_cis-hook|page=object/xp2_03lkmzojc0cjo/b3s23|accessdate=July 16, 2019}}</ref>) though these lead to larger [[bounding box]]es.

The first [[soup]]-based syntheses for this oscillator were discovered by [[Mark Niemiec]] on December 17, {{year|2004}} based on results from [[Andrzej Okrasinski's census]], costing {{gliders|11|brief}} gliders for the house-stabilized version and {{gliders|16|brief}} for the bookend-stabilized version.<ref>{{CiteSummersPattern|name=jslife|accessdate=January 5, 2020}}</ref>

The first [[soup]]-based syntheses for this oscillator were discovered by [[Mark Niemiec]] on December 17, {{year|2004}} based on results from [[Andrzej Okrasinski's census]], costing {{gliders|11|brief}} gliders for the house-stabilized version and {{gliders|16|brief}} for the bookend-stabilized version.<ref>{{CiteSummersPattern|name=jslife|accessdate=January 5, 2020}}</ref>